556381 has 8 divisors (see below), whose sum is σ = 646784. Its totient is φ = 468720.

The previous prime is 556373. The next prime is 556399. The reversal of 556381 is 183655.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 556381 - 2³ = 556373 is a prime.

It is a super-2 number, since 2×556381² = 619119634322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 225 + ... + 1078.

It is an arithmetic number, because the mean of its divisors is an integer number (80848).

2⁵⁵⁶³⁸¹ is an apocalyptic number.

It is an amenable number.

556381 is a deficient number, since it is larger than the sum of its proper divisors (90403).

556381 is a wasteful number, since it uses less digits than its factorization.

556381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1371.

The product of its digits is 3600, while the sum is 28.

The square root of 556381 is about 745.9095119383. The cubic root of 556381 is about 82.2477634176.

The spelling of 556381 in words is "five hundred fifty-six thousand, three hundred eighty-one".